CVE-2002-1425 in mpack
Summary
by MITRE
Directory traversal vulnerability in munpack in mpack 1.5 and earlier allows remote attackers to create new files in the parent directory via a ../ (dot-dot) sequence in the filename to be extracted.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 07/01/2024
The vulnerability described in CVE-2002-1425 represents a classic directory traversal flaw affecting the munpack utility within the mpack package version 1.5 and earlier. This security weakness resides in the file extraction process where the application fails to properly validate or sanitize filename inputs before performing file operations. The vulnerability specifically manifests when processing archive files containing filenames that include ../ sequences, which are commonly used in directory traversal attacks to navigate up directory trees. The flaw enables malicious actors to manipulate the extraction path and potentially write files to unintended locations outside the intended target directory, creating a significant security risk for systems processing untrusted archive content.
From a technical perspective, this vulnerability operates at the input validation and file system interaction level where the munpack utility does not adequately sanitize user-supplied filenames during extraction operations. The application processes filenames without proper path validation, allowing the ../ sequences to be interpreted literally by the underlying file system operations. This creates an opportunity for attackers to specify arbitrary file paths that bypass normal directory boundaries. The vulnerability directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw is particularly dangerous because it can be exploited remotely through network-based file processing operations, making it a significant concern for web applications or services that handle file uploads or archive extraction.
The operational impact of this vulnerability extends beyond simple file creation in parent directories. Attackers can leverage this weakness to overwrite critical system files, create backdoor access points, or establish persistent access within compromised systems. When systems process untrusted archive files through vulnerable mpack versions, they become susceptible to arbitrary file system modifications that can compromise system integrity and confidentiality. The vulnerability is particularly concerning in environments where automated file processing occurs, as it can be exploited through automated attack vectors without requiring user interaction. This type of vulnerability aligns with ATT&CK technique T1059.007, which covers the use of script-based commands for execution, and T1566, which involves the exploitation of vulnerabilities in software to gain unauthorized access.
Mitigation strategies for CVE-2002-1425 focus primarily on updating to patched versions of the mpack package where the directory traversal vulnerability has been addressed through proper input validation. System administrators should implement comprehensive file validation mechanisms that sanitize all filenames before processing, particularly those containing directory traversal sequences. The implementation of strict file path validation and the use of secure coding practices that prevent path traversal attacks should be enforced across all file processing components. Organizations should also consider implementing network segmentation and access controls to limit exposure to vulnerable systems. Regular security assessments and vulnerability scanning should include checks for outdated mpack versions and other software packages that may be susceptible to similar directory traversal vulnerabilities. Additionally, the principle of least privilege should be applied to file processing operations to minimize the potential impact of successful exploitation attempts.